JPS5917516Y2 - Drying oven for coated welding rods - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drying oven for coated welding rods, and more particularly to a drying oven equipped with a conveying device that passes through the drying oven.

Means for transferring the welding rod by appropriately combining a belt conveyor or the like in a welding rod conveying means or a processing device is known.

For example, a conveyor device as described above is provided in the process of drying coated welding rods or in other processing steps.

By the way, as shown in FIG. 1, a conventional conveyor device generally used in a drying oven for welding rods has endless conveyor devices 1, 11, and 21 stacked in a heat medium atmosphere in a drying oven 3. Welding rods 2 transferred by a conveyor device 1 are dried and sequentially transferred to a lower conveyor, transferred to a belt conveyor 21, and taken out.

These conveyors are used as holding means for drying the welding rod 2 by exposing it to a dry atmosphere for a certain period of time while conveying the welding rod 2 at an appropriate speed.

In addition, in such a multi-stage conveyor device in a drying oven, the aeration surface is reversed every time the welding rod 2 is transferred to the lower conveyor.
Although it is constructed so as to obtain a uniform drying state, it is not always possible to perform proper inversion.

In addition, in such a conveyor device, the drying oven must have a sufficiently large space in order to install the sprockets la, 11a, 11b, 21a and the guide plate 4 that support and rotate the conveyor. Requires.

Therefore, it not only requires an excessive heat capacity but also increases the installation volume, which is extremely uneconomical.

Moreover, since such a conveyor device transfers the welding rod 2 to the lower conveyor by gravity, undried coating material may peel off or damage the coating surface during transfer.

Furthermore, if these multi-stage conveyor devices are not configured to smoothly transfer the welding rods 2, they may become clogged during transportation, reducing work efficiency and increasing the number of defective products.

Therefore, in the conveyor device installed in the trunk drying oven 3, the suitability of the transfer means not only affects the efficiency of the drying oven but also the quality of the welding rod.

Therefore, instead of using a multi-stage transfer type conveyor system in the welding rod drying furnace, it is better to use a single conveyor system that eliminates transfers and has multiple stages of a low-speed transfer type to improve drying efficiency and product yield. I thought it could be improved.

The present invention was developed in view of the above-mentioned circumstances, and its purpose is to reduce the size of the drying oven by applying a space-saving conveyance device to the drying oven.
Allows the installation of a multi-layer single conveyor device in the drying oven,
The present invention also aims to provide a drying oven that has high thermal efficiency and that produces welding rods of excellent quality.

The configuration of the present invention that achieves this object is a drying furnace that is provided with a multi-stage welding rod conveying device that is provided so as to penetrate through the inside of the drying furnace, and the conveying device has a rotation axis that is substantially vertical. The gist is that two conveyor chains rotated in a direction connecting the inlet and the outlet by two sets of multi-stage sprockets supported by the conveyor chain are constructed so that the two conveyor chains lie in the same horizontal plane. It is something.

The configuration and effects of the present invention will be explained below based on the drawings, which are examples. However, the following examples are only specific examples of the present invention, and the design may be modified in various ways in keeping with the spirit of the above and the following. All of these are included within the technical scope of the present invention.

FIG. 2 is a sectional view illustrating the present invention, FIG. 3 is a schematic plan view thereof, and FIGS. 4 and 5 are side views illustrating the main parts of the present invention in an enlarged manner.

FIG. 2 shows an embodiment of the drying oven of the present invention, which has approximately the same capacity as a conventional drying oven, and four sets of conveying devices are provided passing through the inside of the drying oven 3.

That is, in this embodiment, one set of sprockets t-5a, 5b
, 5C, and 5d are attached to the drive shaft 15a and the driven shaft 15b in multi-stage construction, and are constructed so that they can rotate freely.

In FIG. 3, the conveying devices provided to penetrate the trunk drying furnace 3 are sprockets 5a, 5b, and 5c.

It is composed of (two threads) chains 9a, 9b which are rotatably formed by the chain 5d, and the chains 9a, 9b
are each configured to maintain tension by a tension roller 6 via a guide roller.

That is, the conveying device installed in the drying oven of the present invention is arranged such that the two chains 9a and 9b can form a substantially horizontal plane with each other, and each chain device is connected to a sprocket that is pivoted in a substantially horizontal direction. The conveyor device is constructed in a two-dimensional manner.

It is configured to reliably receive the undried welding rod 2 conveyed from the supply conveyor 8.

FIG. 4 is a partial side view illustrating the state in which welding rods are transferred from the supply conveyor 8 to the conveying device provided in the drying oven of the present invention. A locking piece 18 is provided to regulate the supply pitch.

In addition, a chain 9b (same as 9a) passing through the drying oven 3
has a plurality of stoppers 17.17 on its welding rod carrying side.
．． ... are provided at approximately equal intervals.

This rod 17 enables horizontal movement of the welding rod 2 and also regulates its feeding pitch.

The supply conveyor 8 is formed to be inclined so that its lower end is buried between the chains 9a and 9b.
is configured to support the center of the welding rod 2, leave both ends intact, and pass both ends to a conveyor device composed of chains 9a and 9b.

Therefore, the clearance between the chains 9a and 9b is made shorter than the length of the welding rod 2.

That is, the welding rod 2 supplied by the supply conveyor 8 leaves the locking piece 18 and is transferred onto the chains 9a, 9b when the conveyor 8 passes over the upper surfaces of the chains 9a, 9b.

The transferred welding rod 2 is then conveyed in the direction of arrow A while maintaining the supply pitch by the stopper 17, and is sufficiently dried in the drying oven 3.

On the other hand, in FIG. 2, the supply conveyor 8 and discharge conveyor 20 provided corresponding to each stage are also constructed in the same manner as described above.

Further, 23 is a speed reducer that adjusts the rotational speed of the drive motor 24 to drive the drive shaft 15a.

In other words, the conveying device of the present invention supports only both ends of the welding rod 2, and conveys the welding rod 2 using two chain conveyors stretched along the supporting direction, so that the outer circumferential surface of the welding rod 2 is almost open. Moreover, since the transfer occurs in one direction, the heat medium in the drying oven 3 is effectively contacted.

Therefore, efficient drying is possible, and since the welding rod is not rotated or dropped, the coating material is not damaged, and extremely good welding rods 2 can be produced in large quantities.

The welding rod 2 that has undergone the drying process in this way is carried out by a carry-out conveyor 20 installed opposite to this conveyance device on the exit side of the drying oven 3 (see Fig. 5). 20 is constructed similarly to the supply conveyor 8 described above.

It is desirable that the carry-out conveyor 20 is configured so that the welding rods 2 sent out by the chains 9a and 9b can be carried out and sent to the next process while maintaining the same pitch.

Note that since the coating material of the welding rod to be carried out has already been dried and solidified, the design of the carrying out conveyor 20 may be changed as appropriate depending on the mode of the next process.

For example, connect the inclined plate 22 as shown by the dashed line to the sprocket 1~
5a and 5c (FIG. 3) from the axis to the rear, and can be freely modified and implemented, such as by configuring the welding rods 2 to be sequentially dropped and collected as they are carried out from the conveyance device.

Further, the feeding method using the feeding conveyor 8 is not limited to the one shown in the drawings, and may be similarly implemented by directly connecting the coating material coating station or by changing to other feeding means.

Furthermore, the running positions of the chains 9a and 9b are formed so that they pass through the inside of the drying oven, but considering thermal efficiency and thermal expansion on the chains 9a and 9b, as shown by the dashed line in FIG. It is also possible to surround the outer wall of the drying oven 3 as shown by 3' so that the chain on the forwarding side can pass outside the drying oven 3 and be used for circulation.

As described above, since the conveying device provided in the drying oven of the present invention can be used in combination with multiple stages, productivity can be extremely high.

The configuration and shape of the conveyance device are not limited to those shown in the drawings, but the point is that two chains are wound around a sprocket whose axes are arranged so that the planes are almost horizontal to each other, and the two chains are almost identical. The welding rod may be of any shape as long as it is configured to run in parallel while maintaining a flat surface and can be carried by supporting both ends of the welding rod with two chains.

Although roller chains are shown as the chains 9a and 9b, conventionally known conveying means such as a link chain or a chain with a fixture attached to a wire can be used.

The present invention is constructed as described above. (1) The drying condition of the welding rod is extremely good, and the quality of the coating material is stable.

■ The welding rod can be dried evenly over the entire surface and no damage is caused.

■ Productivity can be increased with a small drying oven.

You can enjoy benefits such as:

[Brief explanation of drawings]

Fig. 1 is a sectional view illustrating a conventional drying oven, Fig. 2 is a sectional view illustrating the present invention, Fig. 3 is a schematic plan view of the same, and Fig. 4 and 5
The figure is an enlarged side view illustrating the main parts of the present invention. 1, 11.21... Belt conhair, 2... Welding rod, 3... Drying oven, 4... Guide plate, 6... Tension roller, 5a, 5b, 5C, 5d- sprocket, 8... Supply conveyor, 9a, 9b... Roller chain, 15a... Drive shaft, 15b... Driven shaft, 1
7... Stopper 18... Locking piece, 20... Carrying out conveyor, 22... Inclined plate, 23... Speed reducer, 24
...Drive motor.

Claims (1)

[Scope of utility model registration request] A drying furnace is provided with a coated welding rod conveyance device that receives coated welding rods supplied one by one from the entrance side in the drying furnace and conveys them toward the exit, and the conveyance device rotates in a substantially vertical direction. The conveyor chain is characterized in that two sets of multi-stage sprockets supported by a shaft are configured such that two conveyor chains rotating in the direction connecting the inlet and the outlet are located in the same substantially horizontal plane. A drying oven for coated welding rods.